Apparatus for the production of mixtures of gas and air.



PATHNTED' AUG. 20, 1907,

H. L. KARGER.

APPARATUS FOR THE PRODUCTION OF MIXTURES 01- GAS AND AIR.

APPLIOATIOH FILED 0OT.1. 190B.

3 SHEETS-SHEET 1.

w/r/vwszs W711. 5 m W M417 awn! 70/? flez' arialzl .Idryer 1n: :vowmsPETERS an, wAswmcron, n. c.

PATENTED AUG. 20, 1907.

H. L. KARGER.

APPARATUS FOR THE PRODUCTION OF MIXTURES 0F GAS AND AIR.

APPLIOATION FILED QOTJ. 1903- 8 SHEETS-SHEET 2.

rm! NORRISPETERS col, WASHINGTON, nJc.

PATENTED AUG. 20, 1907.

H. L. KARGER. APPARATUS FOR THE PRODUCTION OF MIXTURES 0F GAS AND AIR.

APPLICATION FILED 0(]T.1 1903.

3 SHEETS-SHEET 3- THE nuRRls PETERS co, wnsnmzmn. o. c

UNITED STATES PATENT OFFICE.

HEINRICH LOUIS KARGER, OF BERLIN, GERMANY, ASSIGNOR TO THE FIRM OF SELASGESELLSOHAFT M. B. 11., OF BERLIN, GERMANY.

APPARATUS FOR THE PRODUCTION OF MIXTURES OF GAS AND AIR.

Specification of Letters Patent.

Patented Aug. 20, 1907.

Application filed October 1,1903. Serial 175,328.

To all whom it may concern:

Be it known that HEINRICH Lou 1s :KARGER, a subject of the Emperor ofGermany, residing at 26 Frankfurter allee, Berlin, in the Empire ofGermany, engineer, has invented certain new and useful Apparatus for theProduction of Mixtures of Gas and Air, of which the following is aspecification.

My invention relates to apparatus for producing mixtures of gas and airto be used in connection with illuminating burners.

The more particular objects of my invention are to secure uniformity inthe admixture as the same is employed under Varying degrees of pressure,and also to produce a comparatively simple and eflicient form of mixingapparatus for the gas and air.

My invention further relates to certain details of construction forattaining great sensitiveness in the obturating valve, as hereinafterdescribed.

Reference is to be had to the accompanying drawings forming a part ofthis specificationpin which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side diagrammatic section showing the apparatus asemploying separate pumps for the gas and air; Fig. 2 is a section uponthe line EF of Fig. 5 and GH of Fig. 6, showing a revoluble valve 33 forcontrolling the capacity of the back suction conduit used for relievingexcessive pressure in the service mains; Fig. 3 is a section on the lineAB of Fig. 4, showing a form of apparatus in which a common pump is usedfor both gas and air; Fig. 4 is a plan view of this pump and itsaccompanying parts; Fig. 5 is a side elevation of the same; Fig. 6 is anenlarged vertical section through the cylinder and float mechanismcontained therein for automatically controlling the valve in the backsuction conduit; and Fig. 7 is a horizontal section through the sameupon the line OD.

The air suction cylinder 1 of Fig. 1 is in communica tion with the airadmission valve 2, and the gas suction cylinder 3 with the gas admissionvalve 4 in the known manner. The cranks 7, 8 for the two pistons 5, 6are arranged at an angle of 180 to each other, so that suction isproduced by each alternately. In the pressure conduit 9 common to thetwo cylinders the two pressure valves 10 and 11 are arranged. Thesuction chambers of the two cylinders 1 and 3 communicate one with theother by means of the relief pipe 12. In this relief pipe is arranged athrottle or obturating valve 13 or the like, which is connected by meansof a lever 14 and rod 15 with a membrane 16 mounted in a special casing18. The conduit 17 places the lower side of the membrane incommunication with the pressure conduit 9.

The operationisas follows: If the pressure in the service conduit 9increases or diminishes, the actuating device l6 influences the flowregulator 13 in such a mannor that the cross-section for the flow isincreased or decreased. As a result of an increase of the cross-sectionof the passage, with the alternate operation of the two suction pistonsthere will be effected simultaneously with the suction through theopened suction valves, a suction out of the suction and forcing chamberwhich is for the time being under pressure. The total quantity sucked byeach of the two pistons will therefore be constituted: partly by gas andair coming from the suction valves 2 and 4, partly by the supply of gasand air from the suction and forcing chamber which is not effectingsuction at the time. If the suction and forcing apparatus is adapted tothe maximum requirements, the flow regulator 13 will obturate thecross-section of the passage of the relief pipe 12, as soon as the fullsupply is required in the service main from the two suction and forcingchambers.

In the constructional form of the apparatus in Figs. 25, 19 representsthe relief pipe connecting the two ends of the cylinder 20. Theextremities of this conduit are fixed to the casings 21 for the gasadmission valve and 22 for the air admission valve; 23 and 24 are thegas and air admission pipes respectively. Opposite this conduit are thevalve casings 26, 27 for the pressure valves, one of which (the valve28) is represented in section in Fig. 3. The cominon pressure conduit 29is connected with these pressure valve casings by means of bent conduits25. A cock 30 or the like is provided in the conduit 23 for regulatingthe supply of gas.

A valve casing is inserted in the circulation conduit 19 by means offlanges 31 32 or by screwing; this casing contains a piston slide 33.The piston rod 34 projects downwards and is provided with a plate 35 forthe reception of weights or the like. Upon the lower flange of the valvecasing a pipe 37 is attached by screw bolts 36, 36, its lower portionbeing screwed into an obturating part 38. In this part 38 a second pipe39 is inserted in such a manner that between the pipe 37 and the pipe 39an annular space serving for the reception of mercury and of the float40 is left. The inner pipe 39 is provided above with ribs or the likethrough the middle point of which the guide rod 41 for the float passes;this rod is screwed into a loading weight 42. Into this weight 42 isalso screwed the rod 43 upon which the piston rod 34 of the valve restsby the action of gravity. The interior of the hollow cylinder 39 is connected by the branch pipe 44 with the pressure conduit 29, and thisbranch pipe is screwed into the obturating part 38.

The operation of this device is as follows: If the pressure in theservice main 29 increases or diminishes, the float 40 and with it thepiston valve 33 containing the member 45 will rise and fall. By thismeans the cross-section of the passage of the circulation conduit isincreased or diminished. Otherwise the operation is exactly the same asthat described with reference to Fig. 1, as in both cases the pressurein the service main controls a valve for governing the flow of theadmixture of gas and air through the circulation conduit.

The constructional forms above described and shown in the accompanyingdrawings may be varied in many respects without departing from thespirit of my invention, the scope of which is governed by the languageof the appended claims.

It will be noted that when either form of apparatus is in operation anyvariation in the back pressure from the service main or its equivalentdoes not produce a difference in the proportion of gas and air. Theresult is that no matter what variations may take place in the pressureof the admixture as used, and no matter Whether the apparatus may beoperated rapidly or slowly, the proportion of the admixture must remainconstant. It will also be noted that the form shown in Figs. 2 to 7inclusive is exceedingly sensitive, because of the sensitiveness of thefloat.

What I claim and desire to secure by Letters Patent of the United Statesis member being connected with said pressure conduit and controllable byback pressure therefrom exceeding a predetermined limit.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses this 9th day of Septbr 1903.

HEINRICH LOUIS KARGER.

Witnesses \VOLDl-JMAR HAUIT, HENRY HASPER.

